So, I just got the chance to try a couple of smartmatrix 4 boards I bought from adafruit.
really cool that you can just plug it in the panel, plug the teensy on the other side, and you’re done. Very cool design/idea
honestly it feels weird and unnecessary to have APA102 support
a) arduinos can do WS2812B timing well enough that virtually no one buys the more expensive APA102s when you have FastLED support on your microcontroller
b) I’m not very likely to buy a smartmatrix to control an APA102 when a simple level shifter would do the job (or maybe it just works with 3.3V like many WS2812B chips)
c) if I’m driving LED panels, why would I also want to run APA102 at the same time, feels weird.
ok, I can use the APA102 connector to connect power from the board to the panel. Actually I was going to power the panel from my laptop without another power supply because my laptop can output 2A over USB. Well, except that the copper trace on the board is too thin and doesn’t pass the 2A.
I had to work around it by soldering my own wires back to the teensy to bypass the copper trace and now it works. It passes enough power that if I make things too bright, it’ll hit the 2A current limit on my laptop.
Still, something worth improving for v5 I guess
But overall I really like the board, thanks for making it, and can’t wait for an ESP32 version (except for the sad part that ESP32 chips all seem to have different pinout, which really sucks for making a board like this :-/ )